Hristo Created a Mortgage,in Favour of Tippi,over a Piece of Land

Hristo created a mortgage,in favour of Tippi,over a piece of land called Blackacre.Which of the following statements is TRUE?

A) If the mortgage created a charge,Blackacre must be located in a land titles system jurisdiction.
B) If Hristo is entitled to create a subsequent mortgage,Blackacre must be located in a land titles system jurisdiction.
C) If the mortgage is enforceable against a subsequent purchaser of Blackacre,Blackacre must be located in a registry system jurisdiction.
D) If the mortgage was indicated on a certificate of title,Blackacre must be located in a registry system jurisdiction.
E) Hristo must have purchased Blackacre from Tippi.